Herdio Marine Stereo Audio MP3 Radio Bluetooth Music with USB Audio Input for ATV UTV RZR xP900 Motorcycle

How do I connect this to an amp?

What are the specifications on the rca pre out? your answers are terrible by the way. please translate better.

Will this unit connect to my phone bluetooth so i can play music off my phone or tablet??? or is this just an out to play thru bluetooth speakers?

How does it connect to an amplifier?